*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19863
19871
198816
19895
19900
19911
19924
19931
19941
19955
199627
199717
19980
199916
20005
20018
20021
20030
20040
20050
20061
20070
20080
20090
20101
20110
20120
20130
20140
20150
20160
20170
20182
20190
20202
20214
20222
20235
20241
Total136